Pivot and Join

Part 1 of how tidy data for functional programming and iteration

John Little

Duke University Libraries

Center for Data & Visualization Sciences

2023-09-18

Tidydata1

Wide data

Code 
library(tidyverse)
library(gt)

tidyr::relig_income |> 
  gt::gt_preview() |> 
  gtExtras::gt_theme_dark()
religion <$10k $10-20k $20-30k $30-40k $40-50k $50-75k $75-100k $100-150k >150k Don't know/refused
1 Agnostic 27 34 60 81 76 137 122 109 84 96
2 Atheist 12 27 37 52 35 70 73 59 74 76
3 Buddhist 27 21 30 34 33 58 62 39 53 54
4 Catholic 418 617 732 670 638 1116 949 792 633 1489
5 Don’t know/refused 15 14 15 11 10 35 21 17 18 116
6..17
18 Unaffiliated 217 299 374 365 341 528 407 321 258 597

Tall data

after tidyr::pivot_longer()

Code 
relig_income |> 
  pivot_longer(cols = -religion, 
               names_to = "income_category", 
               values_to = "income") |> 
  gt::gt_preview() |> 
  gtExtras::gt_theme_dark()
religion income_category income
1 Agnostic <$10k 27
2 Agnostic $10-20k 34
3 Agnostic $20-30k 60
4 Agnostic $30-40k 81
5 Agnostic $40-50k 76
6..179
180 Unaffiliated Don't know/refused 597

John R Little ● Center for Data & Visualization Sciences ● CC BY 4.0